import os

def list_files_in_folder(folder_path):
    files_list = []
    for root, dirs, files in os.walk(folder_path):
        for file in files:
            files_list.append(os.path.join(root, file))
    return files_list

data_folder_path = './Data'
file_names = list_files_in_folder(data_folder_path)
print(file_names)